312009 ÷ 18 
We want to divide 312009 by 18.

Let's proceed to step 1:
When dividing 3 by 18, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 18

Step 2:
18 goes into 31 1 times with a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 18 from 31 to get 13.
Append the next digit (2) from the dividend to 13 and continue with: 132 / 18

Let's proceed to step 3:
18 goes into 132 7 times with a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 17.0
Subtract 126 from 132 to get 6.
Include the next digit (0) from the dividend after 6, then repeat: 60 / 18

Moving on to step 4:
When dividing 60 by 18, we get 3 with a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 173.0
Subtracting 54 from 60 leaves us with 6.
Bring next digit (0) of the dividend behind the 6 and repeat the process: 60 / 18

Advancing to step 5:
18 goes into 60 3 times with a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 1733.0
The remainder is 6 after subtracting 54 from 60.
Fetch the next digit (9) from the dividend, attach it to 6 and continue: 69 / 18

On to step 6:
The number 18 fits into 69 3 times, leaving a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 17333.0
If we take 54 away from 69, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 7:
150 divided by 18 is 8 with a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 17333.8
Subtract 144 from 150 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 8:
The number 18 fits into 60 3 times, leaving a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 17333.83
If we take 54 away from 60, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 9:
The number 18 fits into 60 3 times, leaving a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 17333.833
If we take 54 away from 60, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final result is 17333.833 with a remainder of 0.0006.